In Guinness World Records 2001, this film was said to have the most profanity used in an animated film. The book cited a total of 399 swear words, including 146 uses of the word "fuck", along with 199 offensive gestures and 221 acts of violence.

The song, Blame Canada, was nominated for an Academy Award for best original song. The song lost to Phil Collins' You'll Be In My Heart from the movie Tarzan. In return, Matt Stone and Trey Parker ridiculed Collins in the fourth season of South Park.

Paramount originally asked Trey Parker and Matt Stone if they could make a PG-13 rated film. They said no and would not agree to make a movie until the studio agreed that the final product would be rated R.

Parker, Stone, and fans in general often joke that a majority of the people who saw this film were under 17, and got in by buying tickets to the PG-13 rated Will Smith flop Wild Wild West (1999), the urban legend became so popular in 1999 that the show would spoof the controversy in an episode of the show.

When the children are in rehab, a poster in the back of Mr. Mackey's room reads: "Get High!!! On Pottery", a quote from a high school teacher of Matt Stone's. Original quote: "Son, you need to know not to use pot as a natural high. Instead of getting high with pot, get high with pottery."

Parker and Stone did not need to get Brian Boitano's permission to use his name and likeness for the song "What Would Brian Boitano Do?". A few years later, Boitano DID need to get (and received) Parker and Stone's permission to use the phrase on T-shirts that he sold for charity.

In the film This Film Is Not Yet Rated (2006), Matt Stone claims that the original idea for Cartman's mom's Internet video was of her having sex with a horse (but the act wouldn't be seen on screen). The MPAA would not allow this because of bestiality, despite the fact the at one point in the movie, a picture of a man having sex with a horse is seen (when Dr. Vosknocker is trying to get Cartman attempt to swear and one of his flash cards is "horse fucker"). So Stone and Trey Parker decided to make the Internet video of a German guy defecating on Cartman's mom, and the MPAA approved it.

The original trailer which took jabs at Walt Disney and animation in general was so hated by Parker and Stone that they called it "everything we didn't want the film to be" and Trey Parker was so upset he dismantled the videotape of the trailer and threw in the trunk of his car, then told the Production crew in anger to "do it again"

During the scene where South Park residents are burning everything Canadian, the soldiers in the background are named 'Wright' 'Floyd' and 'Mason', referencing drummer Nick Mason and keyboardist Richard Wright, both of the band Pink Floyd.

When the boys are watching the video of Cartman's mom on the Internet, the button that would normally say "stop" on the Netscape toolbar has been replaced with an obscene drawing and labeled "Sphincter".

The song "What Would Brian Boitano Do?" is a reference to the original Christmas Card "The Spirit of Christmas" which was the inspiration for the South Park (1997) series. In the short, Stan asks Cartman, "What would Brian Boitano do?" when Jesus is fighting Santa.

It's a widely reported myth that the original title of the film was "South Park: All Hell Breaks Loose" and the MPAA forced Trey Parker and Matt Stone to change the title, stating that all movie titles must be G-rated (despite the fact that there are many movies with the word "hell" in them - Hellraiser (1987), Hellfighters (1968), From Hell (2001), etc.). The story comes directly from Parker and Stone who claim that they submitted the film with the original title and were forced to change it. Richard Taylor, a spokesman for the MPAA, denies that any film was ever submitted with that title and that the MPAA did not reject the use of the word "hell" in the title.

According to a pie chart, the entire Canadian economy is based on Terrance and Philip, the snow ball machine, the tourist industry, the log industry, the porn industry, the "Dion Fish" industry, and filming The X-Files (1993).

This film was a joint production of Paramount and Warner Bros. because Comedy Central, the network behind the parent series, was at the time a joint venture of the studios' respective parent companies, Viacom and Time Warner. Though the former now fully owns Comedy Central, its purchase of Time Warner's share in 2003 did not include WB's ownership share in the film. In fact, until 2013, WB retained the rights to co-produce any sequels to this film with Paramount, giving up these rights in order to co-produce "Interstellar". This film stood as the most successful Paramount/WB co-production for nine years.

In the short segment of soldiers marching to the U.S.O. show while singing a cadence song, Jesus Christ appears in the ranks for a moment before the scene transition to Kyle hiding Ike away in the attic.

When Sheila Broflofski holds up the newspaper article about Terrance and Phillip being on the Conan O'Brien show, there are other headlines, including "It's Raining Frogs!", "Christians Agree: Guns Are Nifty", and "Poop Ruled Edible".

Jimbo Kerns can twice be seen with the words "Kill Em All" on front of his helmet. This is the name of Metallica's first studio album who's singer James Hetfield contributed the song "Hell Isn't Good" to the movie soundtrack.

Was, alongside American Pie (1999), one of two explicit films released on the summer of 1999, with the highest number of reports of teenage and underage fans engaging in unsuccessful attempts to gain entrance to theaters and watch the film.

The style of combat when Cartman is cursing and throwing energy is said to be influenced and inspired by the Dragon Ball franchise. Coincidentally, Satan refers to himself as "Mr. Satan" when using the Mr. Hat puppet; Mr. Satan is also the name of a Dragon Ball character.

The ending of the song "Uncle Fucka" (sung by Terrance and Philip in the movie-within-a-movie) makes reference to the famous title song from Oklahoma! (1955), in which the title of the song is spelled out letter by letter.

Some fans believe that the trilogy of the Season 11 episodes "Imaginationland" are the sequel to the movie. These three episodes, released in 2007, were later made into a direct-to-video movie in 2008. It was rumored that an actual sequel to South Park: Bigger, Longer & Uncut (1999) was being planned up to as late as 2011, but nothing came of it. Trey Parker and Matt Stone have said that if a sequel were to be made, it would likely be the series finale.

In an interview in England at the time of release, it was stated that Cartman says c**t in his final showdown with Saddam Hussain to ensure the highest age rating in every country of release and that Matt Stone and Trey Parker were annoyed that the British Board of Film Classification gave the film a 15 certificate instead of an 18 certificate. The BBFC had relaxed the rule that a c word meant an automatic 18 certificate some months earlier.

Winona Ryder, one of the celebrities parodied in this, is portrayed as being pro-war; when she gets onstage at the USO show she makes an inarticulate little speech expressing wonder about war ("I mean, war, man. Wow. War. Y'know? Wow"). Ironically, in real life she was raised in a hippie counter-culture environment and has said in interviews she was taken to anti-war marches and sit-ins at a young age. In 2003 she protested the Iraq war.

Isaac Hayes, who voiced Chef, earlier performed the theme to "Shaft", whose 1970s entries are now owned by Warner Bros., and which had its 2000 sequel released by Paramount, the two studios who collaborated on the "South Park" movie.

Spoilers

The trivia items below may give away important plot points.

Body count before Kenny's wish: 312; after his wish: 7. Since Kenny wishes for everything to go back to the way things were before the war, only those who died prior to the war would remain dead: Kenny himself, Saddam, Conan O'Brien, and the four Baldwin brothers (Alec, Daniel, William, and Stephen).

This Movie has many traits that are similar to Matt Stone and Trey Parkers Broadway Show "The Book of Mormon". Both this movie and the show are a political satire, which mock the Camp nature of Broadway. They Also both contain homages to One Day More (La resistance/Man Up) they also have the same high profanity and controversial humans